Funnel guide bushing



Oct. 30, 1951 H. D. HALEY FUNNEL GUIDE BU SHING Filed Feb. 9, 1950 v INVENTOR. HUGH D. HALE) E g ATTORNEX Patented Oct. 30, 1951 UNITED STATES PATENT OFFICE FUNNEL GUIDE BUSHING Hugh D. Haley, Drexel Hill, Pa., assig'nor to American Viscose Corporation, Wilmington, DeL, a

corporation of Delaware Application February 9, 1950, Serial No. 143,255

9 Claims.

rule supported concentrically on the stem near the bell-shaped or outwardly-flared upper section of the glass funnel. The ferrule is molded independently of the glass portion with an appreciabl larger inside diameter than the outer diameter of the stem. The ferrule is affixed to the glass stem by supporting the ferrule and the glass funnel in a clamping fixture in the relationship desired in the finished spinning funnel and then by pouring molten sulphur into the annular space between the ferrule and the glass stem. When the molten sulphur solidifies, the spinning funnel may be removed from the fixture and attached to spinning equipment.

Funnel guides constructed in this manner have not been entirely satisfactory because of the cost resulting from the multiple-step proce dure for producing them, and the considerable breakage which occurs when they are handled in quantity. The breakage may be attributed principally to their weight of which the lead ferrule is the major portion.

It is an object of the invention to provide a funnel guide of lighter and less expensive construction than the conventionally used guides having lead ferrules. It is still another object to provide a funnel guide having a stem portion replaceable within the ferrule. Another object is to provide a funnel guide less subject to breakage. Other objects, features and advantages will be apparent from the following description of the invention and the drawing relating thereto in which Fig. 1 illustrates a funnel guide with portions in section;

Fig. 2 is an end view of a flexibly resilient bushing used in the funnel guide of Fig. 1; and

Fig. 3 illustrates in section a modified funnel guide.

In brief, the invention comprises a spinning funnel guide having its stem portion supported by spaced resilient bushings within a sleeve having interior circumferentially grooved surfaces, such as helically grooved inner surfaces, for receiving the outer surfaces of the bushings.

The drawing illustrates a funnel guide 4 supported by a bracket 5 in vertically and laterally adjustable relationship. Vertical adjustment of the guide relative to the bracket is obtained by turning the sleeve 1 of the guide within an interiorly threaded bushing 8 in threaded relabe fixed by tightening a lock nut 9.

tionship with the sleeve. The adjustment may The bush! ing 8 extends through an aperture or slot of, sufiicient size in the bracket 5 to provide the clearances H and I2. The bushing is secured by gripping portions of the bracket surrounding the aperture between a flange I4 of the bushing and a lock nut l5 in threaded relationship with the bushing. A washer ll of rubberlike resiliency is provided between the flange and the grooved or serrated surface l8 of the bracket. Lateral adjustment of the guidewith respect to the bracket 5 is obtained within a.

range permitted by the clearances II and I2 by loosening the lock nut 15 and moving the bushing in any desired lateral direction and retightening the nut. The outer peripheries of the. flange l4 and the nut l5 of the bushing and a 1 flange of the sleeve may be polygonal to receive a wrench or other tool. The sleeve has. an inner cylindrical surface 2 in which is formed helical grooves 24 and 25 within the end portions of the sleeve.

A pair of bushings 26 and 2'! each having a H cylindrical outer surface such as that of bushings 28 illustrated in Fig. 2 occupy the end portions of the sleeve. The bushings preferablyv having a slightly greater diameter than that of the cylindrical surface 22 when removed from the bushing so that they will tightly occupythe ends of the sleeve and fill the helical grooves 24, and 25 when the stem 30 of the funnel extends, through the bushings. hold the bushings in place particularly when the stem 30 is forced through them such as when the guide is assembled or taken apart.

As funnel stems vary in diameter within an approximate range of 3 2 of an inch, the bushings arepreferably formed with diameters which cause them to fit tightly about the tubes of smallest diameter within the range of variation. Accordingly, these bushings may have a diameter equal to or slightly less than the smallest stem diameter anticipated. If desired, the bush1 ings may be molded with a helical ridge which:

is complementary to the helical grooves 25 and 25. When the stern portion of the funnel is en larged at both ends, a radially and longitudinally extending cut may be made in the wall of each bushing to implement its installation on.

the stem from a lateral direction.

The funnel guide may be assembled by press:

sleeve, then to place bushings having walls cut,

The grooves 24 and 25 as hereinabove described, on the stem, and then, after lubricating the surfaces adequately, pressing or screwing, the. bushings into place. The outer surfaces of the bushings may' be lubricated with water, oil or other lubricant to facilitate their movement into place within the sleeve. The outer surface of the stem or the inner surfaces of the bushing may also be lubricated when positioning the stem within the bushings. Removal of the stem may be facilitated b'y-applying a lubricant at the outer surfaces of the stem adjacent the bushings and through a hole 32 into the annular space 33 surrounding" the stem portion extending between the bushings.

The bushings 26 and 2'l are fabricated from any resilient material which is resistant to the materi'als'ofthe spin bath. Polyvinyl'chloride, polyethylene; and'polychlorobutadiene are" examples resins which have: suitable resistance to the acid and. the carbon disulfi'de' ordinarily occurring in viscose rayon spinning baths. Such resins form satisfactory resilient bushings in which to mountithe stem portion of" a funnel guide. Soft, lightly vulcanized. compositions containing natural rubber or synthetic rubbers which include polymerized butadiene are generally unsuitable foruse .in connection with the spinningof 'visc'ose rayonbecauseiof their rapid; deterioration in the presence of carbon disulfid'e':

Since breakage from handling may be reduced toa large extent by reducing the weight of the: funnel guide, the sleeve 1" is. preferably constructed with as thin a; wall as ractical. The sleeve may be fabricated from" any rigid material. having the requisite molding and machining properties; and which is corrosion-resistantto materials of thespinning solution and the. spinning bath. Ofthe metals; lead andalloys of. lead and.antimony are preferred when spinning viscose solutions. However, many plastic resins of suitable propertiesareavailable for. molding. a sleeve such as resinsof. phenol'-furfural,.methyl methacrylate, allyl, andvinylidene; chloride; rubber compounds may be: also. used if vulcanized toaa state of considerable hardness;

. Fig: 3' illustrates a guide'of whichthesleeve'la thereof has a smooth cylindrical or slightly tapered'fi'ustoconi'cal surface 31. A guide of this? type-may be used' in spinning installations wherein the guide must be quickly removedduring'thedbffihgoperation by lifting it' from its support. The sleeve 1a. fits closely but not tightly, within a sleeve 32 which by beingin threaded relationsliiirwitli the sleeve l4 may berot'ated with respect' to the. latter sleeve to obtain vertical adjustinent of the guide. I

Theuse of the pair of spaced resilient bushings as amounting for theguideisadvantageous because. of. the positive alignment provided, the economical use of materials,-. the readiness with which the guide maybe assembled or taken apart, and the ease withwhich parts of the guidemay heluhricated'to' implement assembling-or takingapart'of the'guid'e.

, While preferred embodiments of the invention have been shown .and described, it is't'oube under.- stood thatchanges and variations may be made without departingfrom the spirit and scope of the invention asdefined in the appended claims.

I. claim:

l. A spinningfunnel guide comprising aztubular stem portion; a; pair of" spaced bushihgsLof flexibly resilient materiali extending; tightly around. the" stem portion, and. a rigid annular sleve'extendingtightlyaround"thebushings and having circumferential grooves along each porbushings.

22 A spinning funnelguide comprising a tubular stem portion, a pair of spaced bushings of flexibly resilient material extending tightly around the stem portion, a rigid annular sleeve extending'ti'ghtly around the bushings, said sleeve having helical grooves along each portion of its inner surface in contact with the bushings.

3.- A guide as in claim 2 having bushings constituted of' a composition which is essentially polyvinyi-chloride.

4.v A. guide as in claim 2 having bushings constituted of a composition which is essentially polyethylene.

5. A guide as in claim 2 having'bu'shings con stitut'ed' ofa composition containing vulcanized polychlorobut'adiene;

6. A spinning'funnel guide in combination with mounting means therefor" comprising a tubular stem portion, a pairof spaced bushings of 'a flex ibl'y' resilient material extending tightly around the stem portion, arigid annular sleeve extending tightly around the bushings, said sleeve having helical grooves along each portion of'its inner surface in contact with the bushings, mounting means having' three dimensional adjustability' threaded relationship with the outer surface of the sleeve. 7

'7'. A spinning funnel guide in combination with mountingr'neans comprising a tubular stern portion,v a pair of spaced bushings of a flexibly resilient l material extending tightly around the stem. portion, a rigid sleeve extending tightly around the bushings, said sleeve' having an outwardl y extending flange at'the end port'ion'ther'e of nearest the strand receiving portion of the stem", -m'ount'ing means forthe funnel guide havinga vertical aperture, said: aperture complementarily contoured with respect to the" outer surface of the sleeve.

8 A spinningfunn'el guide comprisinga tubuste'm'portion, a pair'of spa'ced bushings of flexibly resilient" material extending tightly around the stem portion, said bushings each having helical ings' extending along each ortion of its" inner surface in contact with thebushings.

9-; A spinning funnel guide comprising a tubu lar' stem portion, a pair of spaced bushings of a? flexibly resilient material extending tightly around the: stem portion and having a slightly smaller inner diameter than the outer diameter of the-stem when the bushings P are removed from the stem, a rigid annular sleeve extending tightly around the bushings and the portions of the I sleeve in contact with" the bushings having a slightly smallerinsidediameter than the outside diameter of the bushings when the sleeve isZremoved from' the bushings; said sleeve having helical: grooves along each portion of its inner" surfaces in contact with the bushings.

HUGH D. HALEY.

Number Date Wider Nov. 1'7, 1936 Certificate of Correction Patent N 0. 2,572,927

In the printed speclficatlon of the rlng oorrectlon as follows: Column 2, hne 21, for surface 2 read surface 2 bushmgs read bus/u 2; lines 25 and 26, for ng; column 4, line 43, for tubuand that the said Letters Patent should be read same may conform to the record of the case in the Patent Office igned and sealed this 19th day of Februa 1 THOMAS F. MURPHY 

